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95f72d1e YL |
1 | #ifndef _LINUX_MEMBLOCK_H |
2 | #define _LINUX_MEMBLOCK_H | |
3 | #ifdef __KERNEL__ | |
4 | ||
95dde501 YL |
5 | #define MEMBLOCK_ERROR 0 |
6 | ||
f0b37fad | 7 | #ifdef CONFIG_HAVE_MEMBLOCK |
95f72d1e YL |
8 | /* |
9 | * Logical memory blocks. | |
10 | * | |
11 | * Copyright (C) 2001 Peter Bergner, IBM Corp. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License | |
15 | * as published by the Free Software Foundation; either version | |
16 | * 2 of the License, or (at your option) any later version. | |
17 | */ | |
18 | ||
19 | #include <linux/init.h> | |
20 | #include <linux/mm.h> | |
21 | ||
411a25a8 BH |
22 | #include <asm/memblock.h> |
23 | ||
37d8d4bf | 24 | #define INIT_MEMBLOCK_REGIONS 128 |
95f72d1e | 25 | |
e3239ff9 | 26 | struct memblock_region { |
2898cc4c BH |
27 | phys_addr_t base; |
28 | phys_addr_t size; | |
95f72d1e YL |
29 | }; |
30 | ||
e3239ff9 | 31 | struct memblock_type { |
bf23c51f BH |
32 | unsigned long cnt; /* number of regions */ |
33 | unsigned long max; /* size of the allocated array */ | |
34 | struct memblock_region *regions; | |
95f72d1e YL |
35 | }; |
36 | ||
37 | struct memblock { | |
2898cc4c | 38 | phys_addr_t current_limit; |
4734b594 | 39 | phys_addr_t memory_size; /* Updated by memblock_analyze() */ |
e3239ff9 BH |
40 | struct memblock_type memory; |
41 | struct memblock_type reserved; | |
95f72d1e YL |
42 | }; |
43 | ||
44 | extern struct memblock memblock; | |
5e63cf43 YL |
45 | extern int memblock_debug; |
46 | extern int memblock_can_resize; | |
47 | ||
48 | #define memblock_dbg(fmt, ...) \ | |
49 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
95f72d1e | 50 | |
5303b68f | 51 | u64 memblock_find_in_range(u64 start, u64 end, u64 size, u64 align); |
7950c407 YL |
52 | int memblock_free_reserved_regions(void); |
53 | int memblock_reserve_reserved_regions(void); | |
5303b68f | 54 | |
3661ca66 YL |
55 | extern void memblock_init(void); |
56 | extern void memblock_analyze(void); | |
2898cc4c BH |
57 | extern long memblock_add(phys_addr_t base, phys_addr_t size); |
58 | extern long memblock_remove(phys_addr_t base, phys_addr_t size); | |
3661ca66 YL |
59 | extern long memblock_free(phys_addr_t base, phys_addr_t size); |
60 | extern long memblock_reserve(phys_addr_t base, phys_addr_t size); | |
e63075a3 | 61 | |
c196f76f BH |
62 | /* The numa aware allocator is only available if |
63 | * CONFIG_ARCH_POPULATES_NODE_MAP is set | |
64 | */ | |
3661ca66 | 65 | extern phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, |
9d1e2492 | 66 | int nid); |
3661ca66 | 67 | extern phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, |
9d1e2492 BH |
68 | int nid); |
69 | ||
3661ca66 | 70 | extern phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
e63075a3 BH |
71 | |
72 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ | |
2898cc4c | 73 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
e63075a3 BH |
74 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
75 | ||
3661ca66 | 76 | extern phys_addr_t memblock_alloc_base(phys_addr_t size, |
9d3c30f5 BH |
77 | phys_addr_t align, |
78 | phys_addr_t max_addr); | |
3661ca66 | 79 | extern phys_addr_t __memblock_alloc_base(phys_addr_t size, |
9d3c30f5 BH |
80 | phys_addr_t align, |
81 | phys_addr_t max_addr); | |
3661ca66 | 82 | extern phys_addr_t memblock_phys_mem_size(void); |
0a93ebef | 83 | extern phys_addr_t memblock_start_of_DRAM(void); |
2898cc4c | 84 | extern phys_addr_t memblock_end_of_DRAM(void); |
3661ca66 | 85 | extern void memblock_enforce_memory_limit(phys_addr_t memory_limit); |
2898cc4c BH |
86 | extern int memblock_is_memory(phys_addr_t addr); |
87 | extern int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); | |
3661ca66 | 88 | extern int memblock_is_reserved(phys_addr_t addr); |
2898cc4c | 89 | extern int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); |
95f72d1e YL |
90 | |
91 | extern void memblock_dump_all(void); | |
92 | ||
35a1f0bd | 93 | /* Provided by the architecture */ |
2898cc4c | 94 | extern phys_addr_t memblock_nid_range(phys_addr_t start, phys_addr_t end, int *nid); |
d2cd563b BH |
95 | extern int memblock_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1, |
96 | phys_addr_t addr2, phys_addr_t size2); | |
35a1f0bd | 97 | |
e63075a3 BH |
98 | /** |
99 | * memblock_set_current_limit - Set the current allocation limit to allow | |
100 | * limiting allocations to what is currently | |
101 | * accessible during boot | |
102 | * @limit: New limit value (physical address) | |
103 | */ | |
2898cc4c | 104 | extern void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 105 | |
35a1f0bd | 106 | |
5b385f25 BH |
107 | /* |
108 | * pfn conversion functions | |
109 | * | |
110 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
111 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
112 | * idea of what they return for such non aligned MEMBLOCKs. | |
113 | */ | |
114 | ||
115 | /** | |
c7fc2de0 | 116 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
5b385f25 BH |
117 | * @reg: memblock_region structure |
118 | */ | |
c7fc2de0 | 119 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
5b385f25 | 120 | { |
c7fc2de0 | 121 | return PFN_UP(reg->base); |
5b385f25 BH |
122 | } |
123 | ||
124 | /** | |
c7fc2de0 | 125 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
5b385f25 BH |
126 | * @reg: memblock_region structure |
127 | */ | |
c7fc2de0 | 128 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
5b385f25 | 129 | { |
c7fc2de0 | 130 | return PFN_DOWN(reg->base + reg->size); |
5b385f25 BH |
131 | } |
132 | ||
133 | /** | |
c7fc2de0 | 134 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
5b385f25 BH |
135 | * @reg: memblock_region structure |
136 | */ | |
c7fc2de0 | 137 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
5b385f25 | 138 | { |
c7fc2de0 | 139 | return PFN_DOWN(reg->base); |
5b385f25 BH |
140 | } |
141 | ||
142 | /** | |
c7fc2de0 | 143 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
5b385f25 BH |
144 | * @reg: memblock_region structure |
145 | */ | |
c7fc2de0 | 146 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
5b385f25 | 147 | { |
c7fc2de0 | 148 | return PFN_UP(reg->base + reg->size); |
5b385f25 BH |
149 | } |
150 | ||
151 | #define for_each_memblock(memblock_type, region) \ | |
152 | for (region = memblock.memblock_type.regions; \ | |
153 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
154 | region++) | |
155 | ||
156 | ||
10d06439 YL |
157 | #ifdef ARCH_DISCARD_MEMBLOCK |
158 | #define __init_memblock __init | |
159 | #define __initdata_memblock __initdata | |
160 | #else | |
161 | #define __init_memblock | |
162 | #define __initdata_memblock | |
163 | #endif | |
164 | ||
95dde501 YL |
165 | #else |
166 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) | |
167 | { | |
168 | return MEMBLOCK_ERROR; | |
169 | } | |
170 | ||
f0b37fad YL |
171 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
172 | ||
95f72d1e YL |
173 | #endif /* __KERNEL__ */ |
174 | ||
175 | #endif /* _LINUX_MEMBLOCK_H */ |